public class Example5_3 {

  public static void main(String args[]) {

     CheapGoods cheapGoods=new CheapGoods();

     cheapGoods.newSetWeight(198);

     System.out.println("对象cheapGoods的weight的值是:"+cheapGoods.weight);

     System.out.println("cheapGoods用子类新增的优惠方法计算价格："+

                         cheapGoods.newGetPrice());

     cheapGoods.oldSetWeight(198.987);

     System.out.println("cheapGoods使用继承的方法（无优惠）计算价格："+

                          cheapGoods.oldGetPrice());

  }  

}
